Realizing high efficiency/CRI/color stability in the hybrid white organic light emitting diode by manipulating exciton energy transfer
Source abstract
Abstract
Abstract By manipulating the transfer path and energy of exciton, a four-color hybrid white organic light emitting diode (WOLED) employing the blue exciplex (TCTA:TPBi) and ultra-thin phosphorescent emitter has been fabricated, which exhibits excellent performances including its efficiency and color characters. The maximum luminance, external quantum efficiency (EQE) and color rendering index (CRI) reach to 9207 cd/m2, 13.6% and 97, respectively. The CIE coordinate offset is only (0.041, 0.006) with increasing the driving voltage from 4 V to 7 V. To our knowledge, this is the highest CRI for the un-doped hybrid WOLED device with high efficiency and color stability. The effects of the position of blue exciplex and the energy barrier between the blue exciplex and intrinsic material on the exciton energy transfer are investigated respectively. We believe that this simple device design may provide a new avenue for un-doped hybrid WOLEDs with high efficiency/CRI/color stability.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
Show source-provided references
1. Isomeric N-linked benzoimidazole containing new electron acceptors for exciplex forming hosts in highly efficient blue phosphorescent OLEDs10.1002/adom.201700036 ↗
2. Highly simplified tandem organic light-emitting devices incorporating a green phosphorescence ultrathin emitter within a novel interface exciplex for high efficiency10.1021/acsami.6b16094 ↗
3. Simple structured hybrid WOLEDs based on incomplete energy transfer mechanism: from blue exciplex to orange dopant10.1038/srep10234 ↗
4. White organic light-emitting diodes with fluorescent tube efficiency10.1038/nature08003 ↗
5. Management of singlet and triplet excitons for efficient white organic light-emitting devices10.1038/nature04645 ↗
6. Aromatic-imide-based TADF material as emitter for efficient yellow and white organic light-emitting diodes10.1016/j.orgel.2020.106017 ↗
7. Highly efficient and color-stable thermally activated delayed fluorescence white light-emitting diodes featured with single-doped single emissive layers10.1002/adma.201906950 ↗
8. High performance non-doped blue-hazard-free hybrid white organic light-emitting diodes with stable high color rendering index and low efficiency roll-off10.1016/j.optmat.2020.109991 ↗
9. Recent advances in white organic light-emitting diodes10.1016/j.mser.2016.06.001 ↗
10. Realizing an efficient warm white organic light-emitting device possessing excellent color-stability and color rendering index10.1016/j.orgel.2019.01.037 ↗
11. Management of charges and excitons for high-performance white organic light-emitting diodes10.1039/b909057f ↗
12. White organic light-emitting diodes10.1002/adma.201002636 ↗
13. Duplicating ‘‘sunlight’’ from simple WOLEDs for lighting applications10.1039/b904382a ↗
14. Hybrid white OLEDs with fluorophors and phosphors10.1016/j.mattod.2014.04.002 ↗
15. Highly efficient fluorescence/phosphorescence hybrid white organic light-emitting devices based on a bipolar blue emitter to precisely control charges and excitons10.1039/D0TC01549K ↗
16. Recent advances in white organic light-emitting materials and devices (WOLEDs)10.1002/adma.200902148 ↗
17. High color stability and CRI (>80) fluorescent white organic light-emitting diode based pure emission of exciplexes by employing merely complementary colors10.1039/C7TC05196D ↗
18. High CRI and stable spectra white organic light-emitting diodes with double doped blue emission layers and multiple ultrathin phosphorescent emission layers by adjusting the thickness of spacer layer10.1016/j.orgel.2019.04.013 ↗
19. Two host-dopant emitting systems realizing four-color emission: a simple and effective strategy for highly efficient warm-white organic light-emitting diodes with high color-rendering index at high luminance10.1021/acsami.6b03374 ↗
20. Combining emissions of hole- and electron-transporting layers simultaneously for simple blue and white organic light-emitting diodes with superior device performance10.1039/C7TC05568D ↗
21. High-efficiency/CRI/color stability warm white organic light-emitting diodes by incorporating ultrathin phosphorescence layers in a blue fluorescence layer10.1515/nanoph-2017-0021 ↗
22. Manipulation and exploitation of singlet and triplet excitons for hybrid white organic light-emitting diodes with superior efficiency/CRI/color stability10.1039/C7TC04528J ↗
23. Remanagement of singlet and triplet excitons in single-emissive-layer hybrid white organic light-emitting devices using thermally activated delayed fluorescent blue exciplex10.1002/adma.201502897 ↗
24. Novel emitting system based on a multifunctional bipolar phosphor: an effective approach for highly efficient warm-white light-emitting devices with high color-rendering index at high luminance10.1002/adma.201600451 ↗
25. Highly efficient white organic light-emitting diodes with ultrathin emissive layers and a spacer-free structure10.1038/srep25821 ↗
26. Highly simplified reddish orange phosphorescent organic light-emitting diodes incorporating a novel carrier- and exciton-confining spiro-exciplex-forming host for reduced efficiency roll-off10.1021/acsami.6b13077 ↗
27. Approaches for fabricating high efficiency organic light emitting diodes10.1039/C4TC02495H ↗
28. Engineering of mixed host for high external quantum efficiency above 25% in green thermally activated delayed fluorescence device10.1002/adfm.201303730 ↗
29. The effect of the exciplex heterojunction interlayer on efficiency roll-off in non-doped blue phosphorescent organic light-emitting diodes10.1016/j.optmat.2019.109561 ↗
30. Highly efficient red electrophosphorescent devices based on iridium isoquinoline complexes: remarkable external quantum efficiency over a wide range of current10.1002/adma.200304630 ↗
31. Highly efficient warm white organic light-emitting diodes by triplet exciton conversion10.1002/adfm.201201858 ↗
32. Novel blue fluorescent materials for high-performance nondoped blue OLEDs and hybrid pure white OLEDs with ultrahigh color rendering index10.1016/j.nanoen.2019.104325 ↗